Automatic code receiving telegraph system



April 9, 1946. H. J. ROSENBERGER 2,398,115

AUTOMATIC CODERECEIVING TELEGRAPH SYSTEM y Filed June 17, 194s 2 sheets-smet 1 IN VEN TOR.

prl 9, 1946. ||.e J. ROSENBERGER 2,398,115

Y AUTOMATIC CODE .RECEIVING TELElGRAPH SYSTE'Jl Filed June 17, 194s 2 she'ets-sheet 2 FEED .rNVENToR HAI/POLO .I /PsfA/BERGER Patented Apr. 9, 1946 AUTOMATIC CODE RECEIVING TELEGRAPH SYSTEM Harold J. Rosenberger, Rockville Centre, N. Y., assigner to All America Cables & Radio Inc., New York, N. Y., a corporation of New York Application June 17, 1943, Serial No. 491,094

10 Claims.

This invention relates to automatic code receiving and tape punching ltelegraph systems and particularly to a system for punching cable code on a tape from received Wheatstone code signals.

The Wheatstone code is a two element code employing the dot and dash system of signals of the standard international code, the dot and dash signal elements being sent by positive or marking current pulses with the dashes three times the duration of the dots, the intervals being indicated by negative or spacing current. Cable code is a three element code, employing positive current pulses for dots, negative current pulsesof equal duration for dashes, and periods of no current for spaces or intervals. The cable code is customarily recorded on paper tape by punching a series of center holes at uniform intervals, an additional hole above the center hole indicating a dot, and an additional hole below a center hole indicating a dash, a center hole alone representing a space. I v

Under certain circumstances it is desirable to punch these cable code indicia on a tape in accordance with received Wheatstone code signals, as in instances where a radio receiver is associated with a cable transmitter. The main pm'pose of this invention is to provide a system automatically actuated by Wheatstone code signals to punch cable code indicia on a tape. Other objects are to provide a simple practical arrangement and to utilize standard types of equipment.

Additional features and purposes Will appear from the following description considered in connection with accompanying drawings, in which Fig. 1 is a diagram of successive cycles of operation, and

Fig. 2 is a diagram of a system embodying the invention.

Referring to Fig. 1, the Wheatstone signal as received consists of a series of space or negative impulses III, dot or short positive marking impulses II and dash or long positive marking impulses I2', the dash I2 being three times the length of dot II. The system includes apparatus synchronized with the incoming signals to providealternate feed contacts I3 and punch contacts I4 at the midpoint of each signal time unit consisting of the reception period of a dot, a space element or one-third of a dash. In the cycle of operations illustrated in Fig. l, the letter R is being received. In punching this letter on the tape I5 successive center holes I6 are punched when no signal is received. Each signal element (dot II or dash I2) starts half way between a. punch contact I4 and the succeeding feed contact i3d.

When such a signal comes in said feed contact I3a also operates a dot selector. If the signal is a dot it will terminate before the next punch contact I4a, which will then punch a dot I7 as Well as the center hole I6. If, however, the signal is a dash it will continue through the next punch contact I4b; and means is provided for eliminating the punching operation and shifting the dot selecting connection to a dash selection. Means is also provided operative during the next feed contact I3b to prevent feeding. The dash terminates prior to the next punch contact |40, which thereupon punches the dash hole I8 as well as the center hole I6. In sending the letter R the next feed contact I3a after the dash hole has been punched and the dot signal starts includes a dot selection step, and the dot I 1 is punched during the following punch contact I4a. y Y

A preferred arrangement for carrying out the described cycle of operations is indicated in Fig. 2. The system is actuated to feed the tape and punch successive holes therein through synchronized alternating contacts energizing alternately the feeding and selecting circuits and the punching circuits respectively. These contacts may be made by any desired apparatus, the form illustrated comprising a continuously vibrating relay employing a vibrating fork 2l which is maintained in vibration in known manner. The fork, which is connected to a source of positive potential, makes contact alternately With points 22 and 23, connected respectively to the punching and to the feed and selection portions of the system. When the fork makes contact with point 23 a circuit is closed through lead 24, armature 25 of polar relay 26, marking contact 2l and lead 28 to feed actuating non-polar relay 29 and thence to a source of negative potential. Armature 3G, connected to a source of positive potential, engages contact 3|, closing a circuit through feed magnet 32. Any desired mechanism for feeding tape I5 maybe employed, the form diagrammatically indicated including an armature 33 carrying pawl 34 engaging ratchet 35 xed to feed wheel 36 which is .provided with feed pins 31 extending into center holes I6 of the tape. With this arrangement the tape will be'fed one interval between center punch holes I6 at each contact of fork 2I with feed point 23.

When fork 2| makes contact with punch point 22 a circuit is. completed through spacing winding 40 of polar relay 26 and resistance 4I to a source of negative potential. A circuit is also completed through armature 42 and contact 43 of non-polar relay 44 to marking winding 45 of relay 25 and thence through resistance 46 to a source of negative potential. However, since resistance 46 is substantially less in value than resistance 4|, the marking winding will exert a predominating eilect and armature 25 will remain in marking position. A circuit is also closed through lead. 41Y to non-polar punch-actuating relay 46. Armature 49 of this relay, connected to a source of positive potential, engages contact 50, closing a circuit through punch magnets to a source of negative potential.

Any desired mechanism for punching center holes, as well as for selecting and punching the dot and dash holes, may be employed, various arrangements for this purpose being known. In the form diagrammatically illustrated the armature 52 carries a punch ram 53v with acenter hole punch 54 at its end registering with a holev in punch block 55 across which taper |5 is fed. With this arrangement ram 53 `will be actuated and a center hole punched in said tapeunder conditions whenever fork 2| engages contact point 22, and armature 42 of relay 44 is onrcontact 43.

When a signal is received it passes through the winding of receiving relay 58 Whose armature 59, connected to a positive potential source,iengages contact 68 and completes a circuit through the windings of non-polarized relays El,` 44 and 62 to a source of negative potential. The arrangement includes means forr synchronizing the oscillations offork 2| -with-theincoming signals. Various arrangements for this purposemay beemployed,

the one disclosed being actuated by relay 62 to close a circuit through magnet coil 63 associated i with the fork 2| when asignal element starts,

serving to'drive thefork in synchronism with the incoming signal.

The timing is arranged so that the signal will start while the fork 2| is in an intermediate posi;`

tion between contact pointsv 22 and 23 traveling towardV the latter. Y When ,contact is made with feed point 23 the tape willvbe, fed in the manner already described. In addition a circuit will be completed through an extension of lead 24, armature 64 and contact 65 of energized relay 6|, marking winding 66 of polar relay 61 and resistance 68 to a source of negative potential. The armature 69 of relay 61, connected to av source of positive potential, is shifted into marking position, engaging contact 1U and completing a circuit through lead 1|, armature 12 of polar relay 13, spacing contact 14 and non-polar dot selector actuating relay to a source of negative potential. Armature 16 of the latter relay, connected to a source of positive potential, closes a circuit through contact 11 andmagnets 18'of the dot selector to a source of negative potential.

The form of dot selector diagrammatically shown includes an armature 19 carrying a selector arm 80 shifted by magnets 18 into operative position between block 8| on ram 53 and the end of dot punch 82 slidably mounted in register with a hole in punch block 55 and held in retracted position by spring 83. It will be noted that the selector arm 80 will remain in position between block 8| and punch 82 as long as armature G9 of relay- 61 remains in marking position and armature 12 of relay 13 remains in spacing position. v

During the feeding operation, when a signal is coming in as just described, a circuit is also closed from lead 28 through spacing winding 84 of relay 13, spacing winding 85-of relay 61 and resistance 86 to a source of Vnegative potential;

but since resistance 6B is of substantially lower value than resistance 86, the greater current through the marking winding 66 of relay 61 will overbalance the current through spacing winding 5 85 and said relay will remain in marking position. After the tape is fed and the dot selector is placed in position, when the signal is a dot I it will terminate While fork 2| is traveling from contact 23 to contact 22. Upon engaging con- 10 tact 22 the punch circuit is closed and the punch ram operated in the manner already described to punch a center hole. However, since the dot selector arm 80 is in operative position a dot hole will also be formed by punch 82 above the center hole.

VIf no signal is coming in when fork 2| next engages contact point 23, the tape I5 is fed and thecircuit through spacing winding 85 of relay lwill throw armature 69 into spacing position, releasing dot selector arm 80 which is retracted by a-suitable spring. However, in the example given in- Fig. 1, the beginning of a dash signal is received'immediately prior to said subsequent contact of forky 2| with point 23; andconsevquently said contact results in feeding of the tape and the location of dot selector arm 80 again in operative position in the manner indicated. But as the signal continues during the next contact of fork 2| with point 22, and since armature 42 of relay 44 is in closed position, the circuit through marking winding 45 of relay 26 is broken, While the circuit through the spacing winding 40 is closed, so that armature 25 is spaced, breaking the feed circuit to relay 29 and the spacing circuitstorelays 13 and G1. Instead, a marking circuit is closed through' contact 90 of relay 44 and marking winding 9| of 'relay 13 to a source of negative potential, shifting armature 12 oi' relay 13 into engagement with marking contact 92- and breaking the circuit to relay 15, releasing the dot selectingarm 80 and .closing a circuit through non-polarV dash selector actuating relay t3.f Armature connected to a source of positive -Y potential engages contact S5 and closes the circuit through dashselector magnets 96 to a source of negative potential. Armature 91 carrying Y dash selector arm 98 is drawn inwardly,l positioning said arm between ram block 8| and the outer gend of dashpunch 99, which isv held in retracted 'position by spring |00 and is slidably mounted in register with a hole in punch block 55.

As already indicated, the signal continues to come in during the next swing of fork 2| from punch contact 22 to feed contact 23. Consequently the feed circuit will remain broken by the spacing of armature 25 of relay 2B, and nothing whatever willv take place. However, the dash signal terminates during the next period of travel of the fork to contact 22, releasing the armatures 'of relays 44 and 6|; so that upon making said contact (|4c of Fig. 1) the punch will be actuated in the manner already indicated, punching a center hole and a dash hole. At the same time relay 26 will be marked by the energizing of winding 45 closing the break in the feed circuit and the 1 reset or spacing circuit of relays 13 and 61. Upon the next feed contact with point 23 the latter relays will both be shifted to spaced position, the tape will be fed and the system will be in con- I 7o dition for a repetition of either the dot cycle or the dash cycle, or for feeding the tape and punch- Ving center holes if no signals are received.

In the illustration given, the last dot of the yletter R commences prior tothe last mentioned feedcontact; consequently relay G1 is shifted to 'punching cable code'tape from received dot and marking position and the dot selector arm 80 is inserted in the manner already indicated, a dot hole being punched when fork 2|4 next vcontacts point 22.

While a preferred arrangement has beenl described, it will be apparent that variations may be made therein without departing from the invention as set forth in claims. For instance, while polar relays have been shown, and; have special advantages under ordinary conditions, equivalent circuits employing non-polar relays and including suitable locking circuits may be substituted.

What is claimed is:

Yl. Automatic telegraph receiving apparatus for punching cable code tape from received dot and dash code signals comprising means for normally step feeding a tape, synchronized means for punching successive center holes in the tape, synchronized dot hole punching means, means responsive to every received signal element for selecting the dot hole punching means for actuation, means for actuating the center hole and dot hole punching means operative after the ter-- mination of marking signal of predetermined duration, synchronized dash hole punching means, means for disabling said selecting, feed and actuating means for one step ofthe feed and for canceling the dot hole selection and selecting the dash hole punching means for operation, responsive to the continuance of a received marking signal beyond said duration, and means for actuating the center hole and dash punching means and reestablishing the feed means after the termination of the latter signal.

2. Automatic telegraph receiving apparatus for punching cable code tape from received dot and dash code signals, comprising a punch circuit including normally operative means for punching center holes in tape and normally inoperative means for punching dot and dash holes respectively in the tape, a feed circuit including normally operative means for step feeding the tape, means for alternately energizing said circuits upon receipt of any marking signal, means responsive to a received marking signal of at least dot duration for selecting the dot hole punching means, means responsive to a received marking signal of greater than dot duration for selecting the dash hole punching means and canceling the dot hole selection, and means for actuating the selected punching means during the energization of the punch circuit system after termination of a signal and the omission of one feed step.

3. Automatic telegraph receiving apparatus for punching cable code tape from received dot and dash code signal comprising punch circuit means including means for punching center holes in the tape normally operative when the punch circuit means is energized, and means for punching dot and dash holes respectively in the tape normally inoperative when the punch circuit is energized: a tape feed circuit means including means for step feeding the tape normally operative when energized, tuned continuously vibrating means for alternately energizing said punch and tape feed circuits and synchronized with received signals and dependent for operation on the receipt of signals` to energize the feed circuit means immediately after the commencement of a received signal element and to energize the punch circuit means immediately following the termination of a received signal element.

4. Automatic telegraph receiving apparatus for VFdash code signals comprising a punch circuit 'means including Ameans for punching center holes in tape, a feed circuit means including means for step feeding the tape, vibrating means for alternately energizing said'two circuit means, a dotpunch selector circuit, a dash punch selector circuit, selecting relay means for selectively -.closing said dot and dash circuits, relay means for energizing the closed circuits, means responsive to a received signal for actuating the energizing relay means during the next energizing ofthe-feed circuit means, means responsive to the continuance of a received signal during the energizing of the next succeeding punch circuit means, for actuating the selecting relay means to closethe dash selector circuit and open the feed circuit means,v and means operative When the dash circuit means is energized following the termination of a received signal element for closing the feed circuit system, actuating a selecting relay to open the dash selecting circuit and close the dot selecting circuit, and actuating the energizing relay to deenergize the closed circuit.

5. Telegraph receiving apparatus as set forth in claim 4, in which the means for opening and closing the feed circuit comprises a relay in the punch circuit means.

6. Automatic telegraph receiving apparatus for punching cable code tape from received dot and dash code signals comprising a punch circuit means, a feed and dot and dash-selection circuit means including means for step feeding the tape, tuned vibrating means for alternately energizing said circuits, a dot punch selector circuit, a dash punch selector circuit, selecting means responsive to received signals for selectively energizing said circuits -When the punch circuit system is energized, and means responsive to a dash signal for disabling the feed circuit system during one step.

'7. Telegraph receiving apparatus as set forth in claim 6, in which the feed circuit disabling means includes means associated with the punch circuit means and actuated to disable the feed circuit When the dash punch selector circuit is energized during reception of a signal of dash length.

8. Automatic telegraph receiving apparatus for punching tape with cable code from received dot and dash elements of Wheatstone code signals comprising a step feeding device, a center hole punching device, a dot punch selecting device, a dash punch selecting device, a controlling relay for each of said devices, circuits for operating said controlling relays in accordance with received marking signals including a punch circuit means and a separate feed and selection circuit means, a continuously vibrating relay dependent for initiation and operation on the presence of incoming signals and connecting a source of potential alternately to said separate punch circuit means and said feed and selection circuit means, a signal receiving relay, and a receiving circuit controlled -by said receivingrelay and containing one or more relays cooperating with said vibrating relay to jointly control the tape feed and the cable code perforations.

9. Automatic telegraph receiving apparatus for punching tape with cable code from received dot and dash elements of Wheatstone code signals comprising a step feeding device, a center hole punching device, a dot punch selecting device, a dash punch selecting device, a controlling relay for each of said devices, circuits for operating lsaid controlling relaysl in' accordance-with receivedv marking signals including a punch circuit means and aseparate feed andselection circuit' means, a continuously vibratingrelay"dependent for initiation and operation on the presence of incoming signals and connecting a source of'potential alternately to Vsaid separate punch circuit means and said feed and selection circuitl means, a signal receiving relay, and a receiving circuit controlled by said receiving relay and con'- taining -one or more relays cooperating with said vibrating relay to jointly control the tape feed and the cable code perforations, and a synchronizing relay forbringing vthe vibrating relay into synchronisln with incoming signals.

l0. Automatic telegraph receiving apparatus for punching'tape with cable code fromrreceived dot and dasl'iv elements of 'Wheatstone code signais comprising a' step 'feeding' device, a" center "-holep'unching device, a dot punch selecting devicefa dash punch selecting device, a controlling relay for each of said devices, circuit means for operating said controlling relays in accordance `with received marking signals and including a i separate punch circuit means and a feed and selection circuit means, a continuously vibratingrelay connecting a source of potential altern'ately to said punch circuit means and said feed and selection circuit means, a signal receiving 

